Based on the output from the command on RouterA, which of the following statements is true about the interfaces? a$.$ Serial$0/0$ is administratively down. b$.$ Serial$0/0$ is administratively up and then turns down. c$.$ Serial$0/0$ is administratively down and then turns up$.$ d$.$ FastEthernet$0/0$ is down. e$.$ Serial$0/1$ is administratively down.